After three months with his girlfriend Miyu, he visits her home and meets her adult sister Wakana. She wanders around nearly naked, braless and without panties, seemingly unaware that her visible nipples and tight camel toe are driving him hard. His insatiable cock finally takes over, and he pounds her in a sweaty frenzy even with his girlfriend nearby. Two loads become three as the follow-up thrusts keep coming, while Wakana's slender body convulses through repeated orgasms.